1) Player 1 uses a sniper rifle with scavenger.
2) Player 1 captures the HQ and stays there while Player 2 sets up tactical insertion inside/near the HQ.
3) Player 1 shoots Player 2 in the head
4) Repeat with next HQ
[There is no score limit in HQ so the faster you plant the tactical and shoot him in the head the more points you will get]
Demolition. (Nuketown)
1) Player 1 plants A and runs to plant B
2) Player 2 defuses A and runs to defuse B
3) Repeat